ETH / ZKSEND
fee 0%- Swap ETH → ZKSENDhook takes 2.00%
- Swap ZKSEND → ETHhook takes 3%
- Add, then remove liquiditycame back whole
pool 0xd9df3df7ebdb399b515288892dafa4cb69ee3eaef90d5c3afbc9679371798e3c
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
7 pools use this hook, the first one 29 d ago.
The address enables before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It takes 3% of each swap on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0%, written in the pool key.
No owner and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
7 pools over 29 days.
Measured at block 93,172,330. A hook with an owner or a dynamic fee can behave differently later; scan again before a large trade.
A v4 hook's permissions are the last fourteen bits of its address. The PoolManager calls only what they switch on.
A small swap each way and a liquidity round trip, run through the PoolManager and this hook inside a call that is never sent. The pool fee is expected; anything else missing is the hook.
pool 0xd9df3df7ebdb399b515288892dafa4cb69ee3eaef90d5c3afbc9679371798e3c
pool 0xf6fdb8b90613e4e817e1dec39dcc89af0e6dcb2305acf975a69adb36d8a62756
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.